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<title>VFK - Czech cadastral exchange data format</title>
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<h1>VFK - Czech cadastral exchange data format</h1>

VFK driver can read data in the <em>Czech cadastral exchange data
format</em>.  The VFK file is recognized as an OGR datasource with
zero or more OGR layers.

<p>
Points are represented as wkbPoints, lines and boundaries as
wkbLineStrings and areas as wkbPolygons. wkbMulti* primitives are not
used. Feature types cannot be mixed in one layer.

<h2>Datasource name</h2>

Datasource name is a full path to the VFK file.

<h2>Layer names</h2>

VFK data blocks are used as layer names.

<h2>Attribute filter</h2>

OGR internal SQL engine is used to evaluate the expression. Evaluation
is done once when the attribute filter is set.

<h2>Spatial filter</h2>

Bounding boxes of features stored in topology structure are used to
evaluate if a features matches current spatial filter. Evaluation is
done once when the spatial filter is set.

<h2>References</h2>

<ul>
<li> <a href="http://josef.fsv.cvut.cz/svn/landa/publications/2010/gis-ostrava-2010/paper/landa-ogr-vfk.pdf">OGR
VFK Driver Implementation Issues</a></li>
<li> <a href="http://www.cuzk.cz/Dokument.aspx?PRARESKOD=998&MENUID=0&AKCE=DOC:10-VF_ISKNTEXT">Czech
cadastral exchange data format documentation</a> (in Czech)</li>
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